Dipper tooth



July 10, 1923. 11,461,136

M CORMICK G. MOORE DIPPER TOOTH Filed'Jan. 2, 1923 E m I I v filmb E 4 Patented July 10, 1923.

STATES Para insane MAOCORMICK GIBSON MOORE, OF WYOMISSINQIENNSYLVANIA, ASSIGNOR TO MOORE & MOORE, INC., 015' READING, PENNSYLVANIA, A CORPORATION 015 PENNSYL- VANIA.

DIPPER TOOTH.

Application filed January 2, 1928. Serial No. 610,128.

1' o a whom it may concern Be it known that I, MAOCORMICK G. Moons, a citizen of the U nitcd States, residing at \Vyomissing. in the county of Berks 5 and State of Pennsylvania, have invented 1 excavating buckets or the like, and particularly to an improved construction thereof havin an endwise reversible oint member, laterally insertable in the bifurcated base portion, and removably secured therein, as more fully described in connection with the accompanying drawings, the novel features being pointed out in the subjoined claims.

Fig. 1 is a side elevation of a dipper tooth showing a preferred embodiment of my invention.

Fig. 2 is a corresponding plan view.

Fig. 3 is an enlarged fragmentary per spective view showing the bifurcated forward end of the base portion of a tooth, and Fig. 4 shows in perspective an endwise reversible point member adapted to be en gaged in said base.

Fig. 5 shows a modified form of a reversible point member.

Dlpper teeth are commonly made in two parts, a base portion and a point member; the base being riveted to the lip or edge of the bucket and the point which receives the greatest wear, formed of a separate piece so secured to the base that it may be replaced when worn. My invention relates to an improved tooth having a point member of simplified and cheapened construction, and of greatly increased wearing qualities.

In the drawings 2 indicates the base portion of a dipper tooth secured to the bucket end 3, as by means of a rearward extension 4 as usual, the part beyond the bucket being made heavy to withstand the shocks of impact, and its blunted wedge shaped forward end laterally bifurcated to form spaced members or fixed jaws 6 and 7 adapted to closely engage a separate point member inserted in the slot or aperture formed between them. The forward inclined edges 8 and 9 of said members 6 and 7 form seats for the projecting point member, and their opposed. faces 10 and 11 are preferably respectively undercut. as shown more clearly in Fig. 3, in opposite inclined directions from the forward edges 8 and 9 and angular rear abutments or shoulders 12 and 13 of an inner recess 14:, toward intermediate meeting edges 15 and 16, and said recessed inner end 14, as shown, has tapered walls 17 and 18 meeting rearwardly and forming an aperture adapted to receive one wedge shaped end of the separate point member. The slot aperture thus formed between the base members 6 and 7 is of greatest width between intermediate edges 15 and 16 and slants equally in opposite directions to the reduced equal Widths between forward edges 8 and 9 and reversely angled rear shoulders 12 and 13, and terminates in the rear wedge shaped recess 14.

The separate point member 19 is preferably shaped as shown in Fig. 4 with oppositely extending arrow-head or wedge shaped cutt ng ends 20, 20 and a broad connecting portion or plate 21, of greatest thickness at its central portion and its top and bottom faces 24 and 25 oppositely tapering from said central portion to the wedge-shaped ends 20, 20, forming barbs or under-cut shoulders 26, 26 and 27, 27 at the inner ends of the latter. The cutting ends 20, 20, as well as the oppositely tapering faces 24 and 25 are preferably like shape as shown so that the point may not only be inverted, but reversed endwise in the base 2 greatly rolonging its usefulness, and its simple orm permits of its being readily forged from bar steel and heattreated to increase its hardness.

This separate point member 19 is laterally insertable between base members 6 and 7, one like shaped end,20, fitting within the recess 14; the reversely inclined connecting portion 21 filling the space between the undercut faces 10 and 11 of said members; and the opposite end 20 projecting beyond the edges 8 and 9 of the bifurcated end of the base 2 with its barbs or shoulders 26, 26 seating rearwardly against the latter, while the barbs 27, 27 of end 2O engage the reversely inclined shoulders 12 and 13. A bolt or rivet 30 engaged in alined apertures 31 and 32 of members 6 and 7 and passing through central aperture 33 of the inserted point member 19, secures the latter in place,-lout the strains of impact against the point, or withdrawal from tenaciously clinging material are carried respectively by edges 8 and 9 or shoulders 12 and 13, the barbs 26, 26 and 27, 27 seating against their reversely inlllltl clined faces and closely engaging the same. And moreover, due to the rearward incline of said undercut barbs or shoulders 26, 26 and 27, 27 and the incline of edges 8 and 9, all impact strains exert a closing instead of wedging apart" action on the bifurcated members 6 and 7 against the closely engaged connecting plate portion 21, preventing breakage of the base portion 2 under the rough usage to which it is normally subjected. The connecting plate portion 21 of the point member is preferably thickened as described to strengthen the same, and its like construction of both ends and top and bottom faces as described permits of its being turned when a face is worn or endwise reversed when one end is worn out or broken.

My improved dipper tooth thus fully described is simple and strong and very cheaply made, and its double-ended reversible point greatly increases the life time of wear of the latter. The connecting plate portion 21 may, if desired, be shaped as shown in Fig. 5, with central recesses 35, and the base .members 6 and 7 correspondingly shaped to give them increased strength, and additional abutment against endwise strains on the point member. The recess 14 may be varied and need not necessarily closely enclose the rear point end, and the latter might be iven a lateral wedging fit between the Eifurcated base members. Other modifications may be devised and I do not desire to limit myself to the specific form shown and described, but:

What I claim is:

1. A dipper tooth comprising a bifurcated base portion and a double-ended point member reversibly insertable cross-wise between the spaced base members with one of its pointed ends projectin beyond the late ter and seating rearward y thereagamst.

2. A dipper tooth comprising a bifurcated base portion and a double-ended point member reversibly insertable crosswise between the spaced base members with one of its pointed ends projecting beyond the latter and seating rearwardly thereagainst; with means for movably securing the inserted point member.

3. A removable double-ended dipper tooth point member having longitudinally spaced opposing shoulders, and a bifurcated base member adapted to laterally receive one point-end and seatingly engage the shouldered portion of said point member.

4. In combination with a bifurcated dipper tooth base; a point member reversibly insertable cross-wise between the spaced base members and havin oppositely extending arrow-head shape cutting ends the outer one of which projects beyond said members with its barbed portions engaging the latter to prevent spreading thereof.

5. In combination with a bifurcated dipper tooth base; a point member reversibly insertable cross-wise between the spaced base members and havin oppositely extending arrow-head shape cutting. ends the outer one of which projects beyond said members with its barbed portions enga ing the latter to prevent spreading thereo the opposed walls of the bifurcated base being formed with abutments ada ted to enga e the inserted portion of sai point mem er. Y I

6. In combination with a bifurcated di per tooth base; a point member reversibi insertable CIOSSW1S8 between the spaced base members and havin oppositely extendmg arrow-head shape cutting ends the outer one of which projects beyond said members with its barbed portions engaging the latter to prevent spreading thereof; the opposed walls of the bifurcated base being formed with abutments adapted to engage the barbed portions of the inner cutting end of said point member.

7. In combination with a bifurcated dipper tooth base; a point member reversibly insertable cross-wise between the spaced base members and having oppositely extending arrow-head shaped cutting ends the outer one ofwhich projects beyondsaid members with its barbed portionsengaging the latter to prevent spreading thereof; the opposed walls of the bifurcated base being formed with abutments adapted to rigidly position the inserted point member longitudinally.

8. A removable double-ended dipper tooth point member having an intermediately thickened connecting portion with longitu dinally spaced opposing shoulders, and a bifurcated base member adapted to laterally receive and longitudinally engage said point member, said members being provided with lalined apertures for passage of a retaining olt.

In testimony whereof I aflix my signature.

MAoCORMICK GIBSON MOORE. 

